Coord 2000 | 18301+0404 | Discov num | CHR 72 | Comp | Aa,Ab | Coord arcsec 2000 | 18 30 05.12 +04 03 55.3 | ||||
Date first | 1985 | Date last | 2021 | Obs | 17 | ||||||
Pa first | 354 | Pa last | 285.1 | P.A. Now (θ) | 285.1° | ||||||
Sep first | 0.2 | Sep last | 0.106 | Sep. Now (ρ) | 0.106" | ||||||
Mag pri | 6.70 | Mag sec | 9.60 | delta mag (ΔM) | 2.9 | Spectral class | B2V (blue-white) | ||||
Pri motion ra | +000 | Sec motion ra | |||||||||
Pri motion dec | -009 | Sec motion dec | |||||||||
Notes | N O (See Notes, Orbital solution) |
Show | name | SAO | coord | wds_name | last | obs | pa | sep | mag1 | mag2 | d_mag | orb | current |
Show | 123571 | 18 30 05 +04 03 55 | CHR 72 Aa,Ab | 2021 | 17 | 285 | 0.1 | 6.70 | 9.60 | 2.90 | Y | <=== | |
Show | HD 170580 | 123571 | 18 30 05 +04 03 55 | STF 2322 AB | 2009 | 25 | 172 | 19.8 | 6.67 | 11.28 | 4.61 | ||
Show | 123571 | 18 30 05 +04 03 55 | STF 2322 AC | 2015 | 10 | 295 | 67.2 | 6.67 | 12.79 | 6.12 | |||
Show | 123571 | 18 30 05 +04 03 55 | STF 2322 AD | 2009 | 7 | 197 | 85.3 | 6.67 | 13.39 | 6.72 |
Constellation | Ophiuchus | SAO | 123571 | HIP | 90676 | Tycho2 | 0454-01662-1 | ||||
Gaia DR2 | 4284093473916591104 | HD | 170580 | HR | 6941 | ADS | 11399 | ||||
BD | BD+03 3727 | FK5 | 3469 | Distance | 507.61 | Distance ly | 1655.82 |
Period (P) | 70.8y | ± 8.7 | Periastron (T) | 2008.3y | ± 2.1 | Semi-major axis (a) | 0.143a | ± 0.025 |
Eccentricity (e) | 0.784 | ± 0.088 | Inclination (i) | 57.7° | ± 9.2 | Longitude of periastron (ω) | 101.2° | ± 5.6 |
Node (Ω) | 44° | ± 9.6 | Notes | n | Reference | Tok2021f | ||
Equinox | Last observation | 2021 | Grade | 4 | (1=Definitive, 9=Indet.) |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st. |
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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